Patents by Inventor Ching Ching Yu

Ching Ching Yu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pointing device
    Patent number: 6870527
    Abstract: A pointing device includes a casing in which a track ball is rotatably received and physically engaging two substantially perpendicular rotatable axles and a biasing structure forcibly biasing the track ball toward the axles. The biasing structure includes a frame rotatably supported inside the casing by pivots and a retainer mounted to the frame. The retainer includes a plurality of pawls spaced along a circumference to form a space for rotatably receiving and retaining a sphere. A biasing element is arranged between the casing and the frame to bias the sphere to forcibly engage the track ball thereby forcing the track ball against the rotatable axles.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: March 22, 2005
    Assignee: Behavior Tech Computer Corporation
    Inventor: Ching Ching Yu
  • Pointing device
    Publication number: 20040145569
    Abstract: A pointing device includes a casing in which a track ball is rotatably received and physically engaging two substantially perpendicular rotatable axles and a biasing structure forcibly biasing the track ball toward the axles. The biasing structure includes a frame rotatably supported inside the casing by pivots and a retainer mounted to the frame. The retainer includes a plurality of pawls spaced along a circumference to form a space for rotatably receiving and retaining a sphere. A biasing element is arranged between the casing and the frame to bias the sphere to forcibly engage the track ball thereby forcing the track ball against the rotatable axles.
    Type: Application
    Filed: January 28, 2003
    Publication date: July 29, 2004
    Inventor: Ching Ching Yu